Apparatus for molding clay or other plastic material.



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APPARATUS FOR MOLDING CLAY '03 OTHER PLASTIC MATERIAL.

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IMO. 67,954. Patented Feb. l2, l90l'.

S. H. RUWLEY & T. TILL. I APPARATUS FOR MOLDING CLAY OR OTHER PLASTICMATERIAL.

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S. H. ROWLEY & T. TILL. APPARATUS FOR MOLDING CLAY OR OTHER PLASTICMATERIAL.

(Application filed July 21, 1899.) (No Model.) 5 Sheets-Shem 5.

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SAMUEL HUNT RUVVLEY AND THOMAS TILL, OF SlVADLINCOTE, ENGLAND.

APPARATUS FOR MOLDING CLAY OR OTHER PLASTIC MATERIAL.

fiPEOIFlIGATZL ON forming part of Letters Patent No. 667,954, datedFebruary 12, 1901.

Application filed July 21, 1899. Serial No. 724,629. (No model.)

To aZZ whom, it may concern.-

Be it known that we, SAMUEL HUNT Row- LEY and THOMAS TILL, ofSwadlincote, England, have invented. certain new and useful Improvementsin Apparatus for Molding Articles in Clay or other Plastic Material, ofwhich the following is a specification.

This invention has reference to apparatus for molding articles inplastic material, and more particularly in clay for the manufacture ofarticles of earthenware, and is more especially applicable to moldingarticles of irregular design.

According to this invention the articles are molded from a slab or sheetof plastic material by the cooperation of a revolving or rocking matrix,which may conveniently be in the form of a cylinder or cylindricalsegment,and a pattern or mold which is moved in a rectilinear directiontangentially to a circle struck from the center of rotation of saidmatrix, or the mode of movement of the parts may be reversed-that is tosay, the matrix may move in a rectilinear direction While the patternrocks or revolves. The molding takes place in such a manner that only aslight width of the clay or plastic material is acted upon at one time,and consequently there is no risk of the pattern or mold being ruptured,cracked, or otherwise injured in the mold ing.

In the accompanying drawings, Figure 1 is a side elevation of a moldingapparatus constructed in accordance with our invention workinginconjunction with a pug-mill, the apparatus being shown with the patternrun out to receive clay or plastic material from the pug-mill. Fig. 2 isa partial side e1evation of the molding apparatus Without a pugmill, thepattern being shown run in under the matrix. Fig. is a plan of themolding apparatus. Fig. i is a partial side elevation of a modified formof the molding apparatus. Fig. 5 is an end view, partly in section, ofthe apparatus shown in Fig. 4. Fig. 6 is a partial side elevation of afurther modification of the molding apparatus. Fig. 7 is a verticalcrosssection on the line A B of Fig. 6. Fig. 8 is a verticalcrosssection of a modification in which the arrangement of the moldingparts is the reverse of that shown in Figs. 6 and 7. Fig. 1 is drawn toa smaller scale than the remaining figures.

Referring to Figs. 1, 2, and 3, 1 is the pugmill with delivery-plate 2,and 3 is a pattern or mold on which the articlesay a lawatoryhasin-to heproduced is molded. The pattern or mold 3, which is of plaster or othermaterial and is formed with a base or bed piece 4, is fixed convex sideuppermost and carried in a cast-iron tray 5, formed on its two oppositessides with supporting-fillets 6, adapted to slide longitudinally on theslideways 7 ot' a framework 8, of metal, wood, or any suitable material.One of the fillets 6 is formed as a toothed rack 9. Two standards 10carry at their upper ends in bearings 11 a horizontal rotary or rockingaxle 12, adapted to be rotated 01' rocked by any suitable means. Thedrawings show this to be effected by a spanner or crank-handle 13. Onthe axle 12, inside and close to one of the bearings 11, is fixed atoothed wheel 14 gearing, with the rack 9. Between the toothed wheel 14and the opposite bearing there is fixed on the same axle a cylinder 15,of plaster or other material, in the peripheryof which there is formedthe molding-cavity or matrix 16. nal contour lines of this matrix invertical sectional planes at right angles to the direction of thelongitudinal travel of the matrix and pattern are envelops of theexternal contour lines of the finished molded article in the sameplanes, while the internal contour lines of the matrix 16 in verticalsectional planes parallel to the direction of the longitudinal travel ofthe matrix and pattern are curves produced by evolution from thecorresponding external contour lines of the finished molded articlethatis to say, the internal contour line of the matrix in any plane oflongitudinal section will be a curve adapted to roll and at the sametime to slide or slip over the corresponding external contour line ofthe finished molded article. In Fig. 2 the dotted line a: or; representsthe internal 0011- tour line of the matrix 16, corresponding to theexternal contour line y y of the finished molded article.

Adjustment horizontally of the bed t is effected by means ofscrew-spindles 17 17,working in the ends of the tray 5, and verticaladjustment of the bed a, for the purpose of con trolling the thicknessof the walls of the finished molded article, is effected by means ofscrew-spindles 18 18, working through the hot- The intertom of the tray5, or the fixing of the mold 3 may be arranged by bed or wedges in thetray 5.

The mode of working is as follows: The pattern or mold 3 is run out byrotating the handle 13 either to the pug-mill spout-plate 2 to receive aslab or sheet 19 of plastic material, as indicated in Fig. 1, or, wherethere is no pug-mill adjacent, to a suificient distance to clear thecylinder 15, so as to allow of a slab or a sheet of clay or plasticmaterial being applied to the pattern 3 by hand. When the pattern 3 isentirely covered with the plastic material, it is then run back byrotating the handle 13 in the reverse direction under the cylinder 15,so that the mold,with clay 19, is carried in a rectilinear direction incontact with the revolving matrix, whereby the molding of the article tobe produced iseffected. The mold 3 may be passed more than once underthe matrix, if found desirable.

In Figs. 4 and 5 the pattern-tray is stationary and the molding-cylinder15 travels over it. For this purpose the cylinder-axle 12 is carried ator near each end in a slide-block 20, working in a slide 21, carried onpillars 22, bolted to a fixed framing 23, to which also the rack 9 ofthe stationary tray is fixed. In this arrangement a rack 9 is providedat each side of the tray-gearing with a toothed wheel 14, fixed on theaxle 12 at each end of the cylinder 16.

In Figs. 6 and 7 the molding-segment 15 is capable of rocking orrotating only through an angle of approximately ninety degrees to eitherside of the central vertical plane of its axle 12. 16 is the matrix ormolding-cavity. The pattern or mold 3 is carried in a tray 5, adapted tomove horizontally to and fro on slideways 7, formed on a fixed framing8. On oneside of the tray there is formed a rack 9, gearing with atoothed sector 14, fixed on the axle 12. To-and-fro motion is impartedto the tray 5 by means of a rod 24, which is pinned in an eye 25, caston one end of the tray and to which to-and-fro motion is imparted by anysuitable means.

In Fig. 8 the pattern or mold 3 is formed on the molding-segment 15,which rocks, and the matrix or molding-cavity 16 is formed in thebed-piece 4, which is carried in the tray 5, that moves horizontally toand fro.

The matrix or molding-cavity may in all cases, if desired, be formed inaseparate piece fitting removably in the molding-cylinder, so that thematrix can be readily replaced by another of different design.

The pattern or mold is also rem ovably fixed to the bed or tray.

In some oasesa cushion in the form of indiarubber tubes 26 or otherwisemay be put in the bottom of the tray to diminish the liability of themold or pattern cracking under pressure.

What we claim, and desire to secure by Let ters Patent, is

1. In apparatus for molding hollow articles, the combination with amatrix, a pattern adapted to cooperate therewith, and means forimparting rotary motion to one of said parts, the contour of said rotarypart being in any longitudinal plane of a configuration adapted to rollupon one of the sides of the molded article with a slipping motion, andin any transverse plane the shape of the corresponding contour of themolded article, and the contour of the other of said parts being of thesame configuration as the other side of the molded article.

2. In apparatus for molding hollow articles in plastic material, thecombination of a rotary matrix Whose internal contour in anylongitudinal plane is a curve adapted to roll on the correspondingexternal contour of the molded article with a slipping motion, and inany transverse plane is an outer envelop of the corresponding externalcontour of the molded article, with a pattern adapted to cooperate withsaid matrix and the cooperating surface of which is an inner envelop ofthe inner surface of the molded article, substantially as set forth.

3. In apparatus for molding hollow articles in plastic material, thecombination of a rotary cylinder having in its periphery a matrix ormolding-cavity Whose internal contour in any longitudinal plane is acurve adapted to roll on the corresponding external contour of themolded article with a slipping motion, and in any transverse plane is anouter envelop of the corresponding external contour of the moldedarticle, means for rotating said cylinder, a pattern adapted tocooperate with said matrix and the cooperating surface of which is aninner envelop of the inner surface of the molded article, and means formoving said pattern at substantially the same surface speed as thematrix, substantially as set forth.

4. In apparatus for molding hollow articles in plastic material, thecombination of a cylinder having in its periphery a matrix ormolding-cavity whose internal contour in any longitudinal plane is acurve adapted to roll on the corresponding external contour of themolded article with a slipping motion and in any transverse plane is anouter envelop of the corresponding external contour of the moldedarticle, a rotary axle on which said cylinder is fixed, a toothed wheelon said axle, a pattern adapted to cooperate with said matrix, and whosecooperating surface is an inner envelop of the inner surface of themolded article, a support for said pattern having a slide on each sideand a rack on one side engaging with said toothed wheel, and a frameworkwith slideways to receive said slides, whereby when the said axle isrotated, the said support is moved with the pattern to bring and pressplastic material between the matrix and pattern to mold the hollowarticle, substantially as set forth.

5. In molding apparatus, a support for the our names in the presence oftwo subscribing article to be molded, a matrix, and means for Witnesses.producing a relative movement of said parts whereby the matrix rotatesalong the sup- 5 port, the matrix having a contour slmped to SAMUEL HUNTROVVLEY. THOMAS TILL.

slip along the contour of the article to be Witnesses: molded. JoHNHARRISON,

In witness whereof We have hereunto signed ANNIE ELIZABETH ELEY.

